National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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RUSSIAN RIVER - HOPLAND (HOPC1)
Latitude: 39.03º NLongitude: 123.13º WElevation: 498 Feet
Location: Mendocino County in CaliforniaRiver Group: Russian Napa
Monitor Stage: N/A Flood Stage: 15.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2022*
10,200
16.65
Oct 24, 2021
2021*
948
4.36
Feb 2, 2021
2020*
2,740
8.20
Jan 16, 2020
2019*
22,200
22.95
Feb 27, 2019
2018*
9,160
16.26
Apr 6, 2018
 Historical High Stage/Flow Events (Period of Record - Oct 1939 to Present) - Ranked by Flow
1956
45,000
27.00
Dec 22, 1955
1965*
41,500
26.01
Dec 22, 1964
1974*
39,700
25.50
Jan 16, 1974
2006*
35,600
26.81
Dec 31, 2005
1986*
32,900
22.96
Feb 17, 1986
 * Discharge affected by regulation or diversion
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ113)
Today: Patchy valley fog in the morning. Rain showers and snow showers through the day. Snow level 1500 feet rising to 2500 feet in the afternoon. Snow accumulations up to 2 inches. Highs 39 to 49.

Tonight: Mostly cloudy. Chance of rain showers and snow showers through the night. Patchy valley fog overnight. Snow level 2000 to 2500 feet. Lows 28 to 38.

Monday: Mostly cloudy. Chance of rain showers and snow showers in the morning, then rain showers likely in the afternoon. Snow level 2000 feet in the morning. Snow accumulations up to 1 inch. Highs 42 to 52.

Monday Night: Rain showers. Lows 38 to 48.

Tuesday: Rain showers. Highs 46 to 56.

Tuesday Night: Mostly cloudy. Rain showers likely. Lows 36 to 46.

Wednesday: Mostly cloudy in the morning then becoming partly cloudy. Chance of rain showers. Highs 49 to 59.

Wednesday Night: Partly cloudy. Lows 31 to 41.

Thursday and Thursday Night: Mostly clear. Highs 49 to 60. Lows 31 to 41.

Friday: Sunny. Highs 54 to 66.

Friday Night and Saturday: Mostly cloudy. Chance of rain. Lows 36 to 46. Highs 51 to 66.
Impacts - E19 Information
15.0 FeetFlooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect minor flooding of crop land on the right bank of the river.
17.0 FeetSignificant flooding of Highway 175 at the approaches to the Russian River bridge. Minor flooding of Highway 222 near Ukiah, and in crop land along the left and right banks of the Russian River near Hopland.
18.0 FeetFlooding of Highway 222 near Ukiah. Secondary roads in low-lying areas will be flooded in the Hopland, Ukiah, and Talmage areas.
20.0 FeetFlooding of low-lying structures east of the railroad tracks near Hopland.
21.0 FeetFlooding of low-lying structures just west of the railroad tracks near Hopland.
23.0 FeetFlooding of farm land, buildings and low-lying homes in the Hopland area. Flooding will begin in the Ukiah and Talmage areas.
24.0 FeetFlooding of low-lying structures and farm land in the Hopland, Ukiah, and Talmage areas. Many secondary roads may also be flooded. Severe bank erosion is possible.
25.0 FeetSevere bank erosion is likely with widespread flooding of farm land, buildings and low-lying homes in the Hopland, Ukiah, and Talmage areas. Many secondary roads will be flooded. This level of flooding caused 6100 acres to flood in February 1940.
26.0 FeetWidespread major flooding will occur. Primary roads and some bridges will flood.
27.0 FeetWidespread major flooding. At the forecast level, over 500 homes and farm buildings were damaged on December 22,1955. 6300 acres of land were inundated by flood waters. All persons in the area are urged to move to high ground and take appropriate action to protect life and property.
28.0 FeetDisastrous flooding will occur. Many homes and businesses could be damaged. Many primary and secondary roads and some bridges could be washed out.
30.0 FeetDisastrous flooding. Many homes and businesses damaged. Numerous primary and secondary roads and some bridges could be washed out. This is equal to the highest known stage, which occurred in December 1937. 6500 acres were inundated by flood waters.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.